System Design Glossary
Concurrency Models
Thread-per-request Model
- Blocking I/O
Reactive Programming
- Non-blocking I/O
- The program flow transforms from a sequence of synchronous operations, into an asynchronous stream of events.
- Publisher and subscriber don’t need to be on the same thread
DDD (Domain-Driven Design)
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- Hexagonal Architecture
Distributed System Patterns
- Ambassador - Proxy pattern for offloading common connectivity tasks
- Circuit Breaker - Prevents cascading failures in distributed systems
- CQRS - Command Query Responsibility Segregation
- Event Sourcing - Store state changes as sequence of events
- Leader Election - Coordinate distributed nodes by electing a leader
- Publisher/Subscriber - Asynchronous messaging pattern
- Sharding - Horizontal partitioning of data across nodes
Event-Driven Architecture
Forward Proxy
See Proxy
Hexagonal Architecture
Also known as Ports and Adapters architecture.
Load Balancing Algorithms
- Round Robin
- Weighted Round Robin
- Least Connections
- IP Hash
- Random
LMAX Exchange Architecture
High-performance trading architecture using disruptor pattern.
Reverse Proxy
See Proxy